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Finding the Third Proportional to 2,921 and 3,946

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Solution

The third proportional to 2,921 and 3,946 is: 5,330.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,921 : 3,946 = 3,946 : x
  2. Step 2: Convert to fraction form
    2,921/3,946 = 3,946/x
  3. Step 3: Cross multiply
    2,921x = 3,946 × 3,946
  4. Step 4: Simplify right side
    2,921x = 15,570,916
  5. Step 5: Solve for x
    x = 15,570,916/2,921
  6. Step 6: Final answer
    x = 5,330.68

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Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.